Structure and magnetism in nanocrystalline Ca(La)B$_6$ films

Details Structure and magnetism in nanocrystalline Ca(La)B$_6$ films Structure and magnetism in nanocrystalline Ca(La)B$_6$ films

2004-02-14

arxiv.org/abs/cond-mat/0402385v1

Physics

Condensed Matter

Materials Science

2 pages, 2 figures, to appear in J. Magn. Magn. Mater

Scientific paper

Nanocrystalline films of La-doped CaB$_6$ have been fabricated by using a rf-magnetron sputtering. Lattice expansion of up to 6% with respect to the bulk value was observed along the direction perpendicular to the film plane, which arises from the trapping of Ar gas into the film. Large ferromagnetic moment of 3 ~ 4 Bohr magneton per La has been observed in some La-doped films only when the lattice expansion rate is larger than 2.5%.

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